const { spawn } = require('child_process');
const ls = spawn('ls', ['-lh', '/usr']);

ls.stdout.on('data', data => {
  console.log(`stdout: ${data}`)
});

ls.stderr.on('data', data => {
  console.error(`stderr: ${data}`)
});

ls.on('close', code => {
  console.log(`子进程退出,使用退出码${code}`)
});
